6533b7d2fe1ef96bd125df92
RESEARCH PRODUCT
Fluorimetric determination of 1-naphthol and mixtures of carbaryl and 1-naphthol in micellar media
J.l. CarriónJ. SancenónM. De La Guardiasubject
Detection limitAmmonium bromidechemistry.chemical_compoundChromatographyChemistryCarbaryl1-NaphtholCationic polymerizationFluorescence spectrometryConcentration effectBiochemistryMicelledescription
The interaction of 1-naphthol with different types of anionic, cationic and non-ionic surfactants has been studied spectrofluorimetrically in order to obtain a sensitivity enhancement in the determination of this compound. At neutral pH, cetyl trimethyl ammonium bromide (CTAB) provides a 2-fold sensitivity enhancement of 1-naphthol and exhibits a weak interaction with carbaryl. In strong alkaline medium carbaryl is hydrolyzed to 1-naphthol and in the presence of CTAB micells, a 5-fold sensitivity enhancement and a limit of detection of 0.2 μg·ml−1 with a 101±3% percentage of recovery is obtained. These facts permit the development of an accurate method for the fluorimetric analysis of 1-naphthol and carbaryl mixtures, comprising the determination of the sum of both compounds (pH 12, 0.1% w/v CTAB, λem=449 nm, λex=341 nm) and of the concentration of 1-naphthol (neutral pH, 0.4% w/v CTAB, λem=449 nm, λex=312 nm).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-01-01 | Fresenius' Journal of Analytical Chemistry |